Police said Tanya Madden's son became ill in March and was taken to Lancaster General Hospital. Tests found cocaine in his system, according to investigators.

"Detectives conducted a search of the inside of (Madden's) residence. That during this search, Detectives located a piece of a clear plastic corner tied baggy consistent with drug packaging material and three clear plastic sandwich baggies. That one of the baggies had white residue in the bag. The white residue was tested and yielded a positive result for the presence of cocaine," a police news release states.

Police say a medical expert concluded that there was no possibility the baby was able to ingest the cocaine accidentally.

The child has since been released from the hospital and is making significant improvements. He will be monitored because long term effects of the exposure are not known. The boy is now with a foster family.

Madden, 24, is charged with aggravated assault of a child less than six years of age, endangering the welfare of a child, corruption of minors and possession of cocaine. She is now being held in the Lancaster County Prison after failing to post $250,000 bail.